Recently, I've noticed an intermittent shift in building times. Specifically, the building time of the Dockyard has been going up and down during the last weeks.
An example: a few days ago I started upgrading the Dockyard from level 7 to 8 in one city and it was going to take 9 days to finish. The next day, I started upgrading the Dockyard to the same level on another city and it was only going to take 7 days to finish. Something similar also happened the previous weeks.
So I was wondering if this is happening because we're having bonus events that temporarily reduce building times, or because devs are adjusting the times.
I couldn't find any information regarding bonus events here in the forum, and in the game all I see is a 20% World Event production bonus when I open the production details in the mines, sawmills and wineyards.
Is there any place where I can see current world events, their bonuses and durations? (and if possible, a list of future and/or past ones would also be nice)
Also, if someone could confirm they've also noticed the shift in building times and it's not only me, please do it to make sure I'm not crazy